/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Character/CharacterGroundConstraintContainer.h
Create a constraint solver for an Evolution with Graph support (World evolution). The system will create several of these: usually one per worker thread (Island Group) but possibly more in complex scenes where constraint coloring is being used. It will be used to solve constraints in groups, with the constraints in each group determined by the graph/islands/islandgroups.
virtual [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FConstraintContainerSolver](API\Runtime\Chaos\Chaos\Evolution\FConstraintContainerSolver) > CreateGroupSolver ( const int32 Priority )